Central Nervous System (CNS)

Peripheral Nervous System (PNS)

This includes the sensory and motor neurons that connect the central nervous system to the body's sense receptors, muscles, and glands; it is at the periphery of the body relative to the brain and spinal chord.

Somatic Nervous System

Autonomic Nervous System

The division of the peripheral nervous system that controls the glands and the muscles of internal organs and thereby controls internal functioning; it regulates the automatic behavior necessary for survival.

Endocrine System

Hormones

Chemical messengers, mostly those manufactured by the endocrine glands, that are produced in one tissue and circulate through the bloodstream to their target tissues, on which the have specific effects.

Amygdala

Hypothalamus

A part of the limbic system that regulates hunger, thirst, body temperature, and sexual behavior; helps govern the endocrine system via the pituitary gland; and contains the so-called reward centers of the brain.

Cerebral Cortex

A thin intricate covering of interconnected neural cells atop the cerebral hemispheres. The seat of information processing, the this is responsible for those complex functions that make us distinctively human.